Skylight installation

Bringing Natural Light Indoors: A Guide to Skylight Installation

Looking to bring more natural light into your home? Well, Skylight Installation is the answer! Skylights add extra sunlight and bring a breath of fresh air and a dash of elegance to your living space. Don’t be daunted by the idea of installation. You can complete it in just one day with some effort and the right tools. This all-inclusive guide will take you through installing a skylight on your roof.

Before You Begin: Understanding the Cost and Tools Involved

Before you embark on a DIY skylight installation project, you must understand the required costs, tools, and expertise. While installing a skylight can save you money, it is crucial to have moderate expertise in handling power tools and cutting roof openings without causing any damage. Additionally, having a friend to assist you in lifting and placing the skylight safely is highly recommended. Here are the essential tools you will need for the installation:

  1. Moderate expertise in handling power tools
  2. A friend to help with lifting and placing the skylight
  3. Skylight and proper flashing (available at home improvement stores)
  4. Roof shingles
  5. Ladder and roofing harness for safety
  6. Chalk line tool
  7. Power drill
  8. Circular saw
  9. Roofing nail gun (or a hammer)
  10. Good quality utility knife

Now that you have a basic understanding of the tools and expertise required let’s delve into the costs associated with skylight installation.

Understanding the Costs of Skylight Installation

The total cost of installing a skylight can vary depending on the type, brand, and installation method. Essential skylights typically cost around $150, while premium options like Velux skylights cost around $600 or more.

Additionally, you will need to purchase the proper flashing or a flashing kit, which can range from $100 to $400. Other costs to consider include various tools, shingles, and additional materials. As a rough estimate, the total cost of a skylight installation project can start from $400 and go up from there.

Step-by-Step Guide to Skylight Installation

Whether you hire a professional roofing company or tackle the installation yourself, it’s essential to understand the step-by-step process of installing a skylight. While DIY installations can be time-consuming, they can also be rewarding. Let’s break down the steps of installing a skylight on your roof.

Step 1: Cut the Roof Opening

The first step is to cut the roof’s opening for the skylight carefully. Begin by selecting a day with good weather to avoid any complications. Determine the location and size of the skylight from inside your home. Ensure that the skylight is positioned between joists for proper support. Suppose you plan to install a large skylight requiring the cutting of multiple roof rafters. In that case, it is advisable to seek professional assistance to avoid compromising the structural integrity of your roof.

Once you have marked the dimensions, use deck screws to indicate the corners on the exterior roof. Remove the shingles within the marked area and use a circular saw to cut out a rectangle following the chalk lines.

Step 2: Install the Flashing

Next, install the flashing along the entire window sill. The flashing acts as a barrier to prevent leaks. Apply self-adhesive flashing on each side and fold it over the edge to create a barrier the width of the skylight sill. Secure the flashing by nailing it down using a roofing nailer.

Step 3: Place the Skylight

With the sill flashing in place, carefully position the skylight in the cut-out area with the assistance of a friend or a pulley system. The skylight should have a flange edge where you can secure it using 1.25-inch roofing nails.

Step 4: Seal the Edges

To ensure a watertight seal, cut a self-adhesive membrane to stick to the skylight’s flange, extending a few inches past its edge. Apply the membrane on all sides of the skylight to create a barrier against leaks.

Step 5: Install Sill Flashing

Your skylight should have a U-shaped piece of flashing to place on the bottom sill. Slide the sill flashing into place and secure it on all sides using a roofing nailer. Reinstall the shingles over the flashing, covering the bottom of the skylight window.

Step 6: Install Step Flashing

Install step flashing on each side of the skylight, starting from the bottom and working your way up. Secure the first l-shaped step flashing piece near the bottom and cover it with a shingle. Continue installing step flashing pieces, overlapping the previous ones by a few inches, and securing them with shingles. Repeat this process on both sides until you reach the top corners.

Step 7: Install Counterflashing

Click the counterflashing into place over the step, flashing on each side. This step is crucial for preventing snow and rain from entering under the edge of the skylight.

Step 8: Install Saddle Flashing

Slide the saddle flashing under the shingles above the skylight and secure it with roofing nails. Reinstall the shingles over the saddle flashing to ensure a watertight seal.

Step 9: Enjoy Your Skylight!

With all the flashing, shingles, and skylight in place, it’s time to admire the fruits of your labor. Safely descend from the roof and head inside to check that everything looks good from the interior. If your skylight is designed to open, test it to ensure smooth operation. Take a moment to bask in the natural light filling your home.


Installing a skylight can be a rewarding project that brings more natural light into your home. Following this comprehensive step-by-step guide, you can install a skylight on your roof. Remember to prioritize safety; if you are unsure about any step of the process, it’s always best to consult a professional. Enjoy the benefits of a well-lit and refreshing living space with your new skylight installation.


What is a skylight, and how does it work to bring natural light indoors?

A skylight is a window installed on your roof to allow natural sunlight to penetrate your living space. It brightens rooms and reduces the need for artificial lighting.

What are the benefits of installing skylights in my home?

Skylights can enhance indoor lighting, reduce energy costs, improve mood and productivity, and provide better ventilation. They can also add aesthetic appeal to your home.

Can skylights be installed on any type of roof?

Skylights, including pitched, flat, or curved roofs, can be installed on most roofs. However, the installation process may vary depending on the roof structure.

Are there different types of skylights to choose from?

Yes, there are various types, including fixed, ventilating, tubular, and electric skylights. Each type serves a different purpose, so choosing the one that suits your needs is essential.

Do skylights require regular maintenance?

Yes, like any other part of your home, skylights need maintenance. Cleaning, inspecting for leaks, and checking seals are essential to ensure longevity and performance.

Can I install skylights, or should I hire a professional?

Skylight installation can be complex, and it’s often best left to professionals. Improper installation can lead to leaks and other issues. Hiring an experienced installer is advisable.

Are there energy-efficient options for skylights?

Yes, energy-efficient skylights with low-E coatings and insulated glazing are available. They help control heat gain and loss, improving the overall energy efficiency of your home.

Discover more from Parker Roofing Contractors

Subscribe now to keep reading and get access to the full archive.

Continue reading

Scroll to Top